Yttrium(III) hydroxide is an inorganic compound and an alkali with the chemical formula Y(OH)3.
Yttrium(III) hydroxide can be produced by reacting yttrium(III) nitrate and sodium hydroxide in aqueous solution:
This gives yttrium(III) hydroxide as a white gelatinous precipitate, which can be dried to a white powder.
Yttrium(III) hydroxide is an alkali, so it can react with acid:
The compound absorbs atmospheric carbon dioxide.
When heated, yttrium(III) hydroxide will decompose:
